The receiver of Bluetooth scheme adopts the Bluetooth audio SoC of Zhongke Lanxun AB5335B as the main control chip.This chip was originally aimed at the noodle earphone market,but with its excellent performance configuration,it is also suitable for car audio equipment.Bluetooth scheme AB5335B Bluetooth chip is equipped with 32-bit processor,supports DSP instruction set,and the highest running frequency can reach 125MHz,which can efficiently process audio data streams.In terms of wireless connection,it fully supports the Bluetooth 5.0 standard,and is compatible with EDR and BLE modes,ensuring stable pairing with various mobile phones and players.
 

This Bluetooth solution chip also integrates the lithium battery charging management function,and has built-in multiple battery protection mechanisms such as overvoltage protection,overcurrent protection and undervoltage protection,which effectively improves the safety of the equipment in the high temperature and vibration environment in the car.Bluetooth scheme chip adopts QFN24 4×4mm small package,which is also convenient for personalized private module design of receiver products.
 

In the aspect of audio coding and decoding,the Bluetooth scheme supports SBC and AAC formats,giving consideration to universality and sound quality performance.At the same time,an additional power isolation module chip named Green Link UG002 is added to the receiver to filter electromagnetic interference and ensure the purity of Bluetooth signal transmission.
 

In order to meet the demand of hands-free call in the car,the receiver has a built-in microphone unit and cooperates with CVC call noise reduction technology.The key link in this Bluetooth scheme can effectively suppress wind noise,road noise and engine noise,and make the call more clear during driving.